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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e126050cdef529789a9fd95b0a1bb8e9152e8b1292799d96104b05fd8a87389b' 
  AND token = 'VPMUuZkr3JN4eddvGSkQ8a49jwy5doIyqNKe/ZG54rI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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