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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f8361f36cfc0717181d0a62d0727a1de36d00a9a13ac76f923f951b28e92ef4' 
  AND token = 'hEXjvmYE7DHgG7y65lseL33/aPXW9rW5DnTaAH8hfNw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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