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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a23ce1f8ef5e5623c6150af6b9b16e1e4d88c63e1401104249d3b133d664efc0' 
  AND token = 'rLVHinXyjeHnnl7wde/LU9oKmYganpWa+dr2ZT2G0vA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00128

JSON explain

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