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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee44185faec9d9ef628df852de1e02fdda65eaf3d6864ab3dfcc2ab998f5daa8' 
  AND token = 'NI5CYxYXHmbq4HgF+veAIX4Xyq7Fhdn+vIdz3G6K3pA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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