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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4791f997924ca01d97fb14f06d7d23fcaabbb71da77b28dfed4d77e4d09faad0' 
  AND token = '67Il+kdnc87Zt8l96n4/TFcJG0DQT96EGmmgvuD8WtU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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