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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0f25511c890c47ba582b486c6cd62b17309800b92a1fa57bfb2b76eda6ebe786' 
  AND token = 'ZZ3P36MZ2YX3icExn/soGeQ352G0KL78G5V+1sqtbEU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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