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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0a0066749bdcb626a6cb3932bc7c67b11c829c152dea55c678846eacfc569bf3' 
  AND token = 'MHMlsCGPTkh7Wr4YL6jO5prjdqDcNwO/t5q0+nOv8ps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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