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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2797cffcb1c8faad3c075aede0ad6866bef69c5b2196893fe9adac23abf94173' 
  AND token = 'SUBvc8frDiH6mnd6Nh0RLTYcUQtxb0TFhLHDG1wAPFQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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