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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '969e27392cfce4576e79a5536041c8a3601ecbfaf9f779f966279d271ac75f00' 
  AND token = 'v3CEWR37R0Z9OMEQ8dVyw/SlDcOxTYfHikjI8wjBM4o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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