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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '71f2e50dc0fdd0dae2d1602730aaca85941ab23d76702116d5b6cf3d2e73277f' 
  AND token = 'uHYEscvduQ06Zj6S1rR48TwUIrQdfIdwP7htVFDseus=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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