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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bbb157ea32da43cacc5f7684d7fd505c33579cb6e21e8c5c6252818372777eaa' 
  AND token = 'WXL4SR+71e84kKPMHlcjSfQsryGb+6S++0gnWd9Br0Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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