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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06d2b0b32f76f0b593873d26c00bed7b184a115e7072d1432c0bb0e7968fc22c' 
  AND token = 'IDXi7fIBfK2e1KzCI8PbKH60kbG1oGElrrEwvE4tWjA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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