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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b07498507bf4d686981cb39f8f7e2c81a28c9cba697ca3437f3772d7f22857d' 
  AND token = 'DaPGeFVpKyYayobPLjPMa2EgZOmX6rYnhO+ixdqqE0E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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