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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '89329cb7301032c40919edceb8b0756a617e94961f09495e242fea4ab60c6b8e' 
  AND token = 'Frx5wWsIql7pbyXlYc2BJgWLHKd9RTirjJCdt3S2u2g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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