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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11d74f98e11231cc821923fb15806ed3b4fe2c150e9938f41aaba60fec147b0b' 
  AND token = 'JtrfOUKJEto/YXm/I5lqWo65HUJgcPYFb9JrCk7GB9M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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