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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '873174ef0862497a33e48ab2b1d1bd71582342773ee9196096d41ae7fa5d777d' 
  AND token = 'dZsZ7g2ORM8+9cwyJEQdD/ypl2bMrrD9Jr2p0ffKqYY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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