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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1832f4eb639928c95ce36c2e8869f6bb2e31763ee26977ac4980b1e1b1622723' 
  AND token = 'Jo5u3CExDQJGCSq8cK3LaESq1gMh5OX2EHITSYQEqds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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