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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1e4da82a9ad566e4fd249839774779b5aba7255fa244aed38d22e32b527eecb' 
  AND token = 'dS4w6iFTdG73gFB+O8AXI+mNqQR0nwM3H0fQ+JOyfnU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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