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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7009a26c9de0986e2bc8f2c4d62bab5ffa6d9f5b01c43aa59d16d1544146d010' 
  AND token = 'y5Kt6xAG1VxK7v2ukkTzpHQccZOE/EfanuugrWZx0A0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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