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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '030fcfe4a234bc430d842a5d2edb9be27407e89f0807b15dc2b4d87ad45b2fdc' 
  AND token = 'cfE7InZj8Pl4e5JENnnB6X1TY2YoBVmOpcXt1KXlNf8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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