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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c1542150f96025cb32b05379d9713b47407b1d9beb41d0eb261e9bf433fd18e' 
  AND token = 'ZLgC3icLPRP0lxYcr4T5oRChgBP5O0iBtyLWQsV1CbM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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