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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae501effd86080078e854ee999142a2fff827cd34683ce15d5e94e883e25709c' 
  AND token = '8yypOPa3fqXF/ivKT88yRIF60gvJAErM2ku75LgNYWI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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