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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0948f2426570705939ae7b3f0504736ca41ccf5aab6fdbb49554d9aa25608139' 
  AND token = 'cRPo8E70lr2q5I8JzQ6hlHQOS9sCUsdzWRW+g8WWmOA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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