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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61a457f75b44b7f2ad2069c34068133ea85714124ba07340531a2100f5109042' 
  AND token = 'jl3J4+a6ygarK0yWmgDz9bTnKQQt37LO+JR5SqY9ml0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}