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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11da6e80840f00316af6e9cd6da8a0894c47b1fe2b5737fa3a4e62ea31050118' 
  AND token = 'fVj0PvHZXUpxtKDaPgTnwThM8P3FYdGecdSx3/X0UeU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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