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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf3fa54a3779602b61a6ece86723efc3ddbc917f0b51265347c73bdecd568537' 
  AND token = 'KINmNK0qH/tprtonBHdzF/oXo1mAOxYKmLQ8Q1hZbeY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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