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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7e0a348e0a9dd6d42212c838d89bfe8497454d57c936ad92fe23a8301dbc068' 
  AND token = 'gXFEFJH5Ni/Ki/d+U5ZerRni4nbbpgozXCr9Q27exWk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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