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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1fa4d7827e063db65d69067944841953883b9f7e090735a564cf89f99e7ec43' 
  AND token = 'rkPPoEMF9u6/ityBOao0o3zPpUEuC7fNIvgzKzSm3Mg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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