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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '02733624be4728ba8605f41d6efa19cd7afcaacb12f1d5d407a7490df476e147' 
  AND token = 'BamSb9sFlY4DXx3/UMptnQle3mWn0UrVGEtk+8Fs+Q4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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