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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ae61b064db8f0d74341fdf1ec64adbaab2a1fd6a6fa8e26122da469a73b17a17' 
  AND token = 'OD1dTpI/PY2rDFe+iIj1m5/EVty2/Ouv4JUEqrN8hko=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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