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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4c4be8daa60a752be32e0bdbb3ae137e10f416d97fea9f4b878fa0ff861aa1b' 
  AND token = 'OfaJUatG/9jIr19rZmIMZO3Jn+g1pGCS7+abWXewicA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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