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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32e45ea9c3df4c530de9e8fef47ca48b0a2c76a5e8770c188092693e92fb598a' 
  AND token = 'n5LXYtwgTEiUpEme1c1mEkSfq5XCW9eOA7G4d2UPevs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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