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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49a2592e3214f487c7435ce4bf9138294f3d46754fc5e589e5694808b0486d95' 
  AND token = 'A5xmFwwQ4EAgzL5v+FRUBcPcEk7q1Wr7G6N9dGHr0Qc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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