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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1bb73af2e3be7f3a87677476f42801aea293324f19b5b7938239f392c3318886' 
  AND token = 'Ip/slzgnRLfxu0diSX+OL8rLOEKLgqZoIa4o+/YR4l8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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