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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '00794439c8772f1ca3a98ae069a124facd5f5430ba755a71470f3a179ddc3a46' 
  AND token = 'hEpkaB6p5c9kYswv6s7VTqopPxr3UCNaNi0gelpgmvY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}