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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2eadb842738a237cb3a16456dc0ddaa1fccfaa1ea7bc0fb1611e7b189322b066' 
  AND token = 'o9IHRFgUYgNcVq2GFSYY56sNUR4aaNxrP52FrKvYlpw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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