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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '74d54aa0ddd66efbe096d6f1cfb9c0bc5aa1848dcfadb2e052c6c9cc11b6b1db' 
  AND token = 'hZkb95acbWwb2kQAIVqe2mq9K1sluzgiWgbCJd5NpJc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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