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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32bd077011ec0e002006aec707f7a06020f3c21c3f46e3882fb74d5050bd29e7' 
  AND token = '/B8hQLmAwB0zo6FDqj1yXLBYtht+d0e+KGAZhtB77oA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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