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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06b8942107bcb13dc29c3cc0101db9b1940716f2d916e12cadf05c24cde5596b' 
  AND token = 'RCyuQRex94XT/C7Fu+rAt1gB+ONmmH2O8+5Vl2iEeLA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00079

JSON explain

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