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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85f0c525c2443f6ab8b1a3eed7c3aa7f1174cc49290ec0bed4431029546990ce' 
  AND token = 'zXqG84rxrRMMlETkGkSiMvHmW3elCxQDfK4fBaT++N0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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