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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c045e1d356be7cf8af2c68241e7f34d8b51bc66894ec385b79015cc40f992ee' 
  AND token = '0lNEuoPjoH+tmgpPymv1QsinW8Ar9OAnlZIzLUjlBt4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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