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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'af6e780f248872e0852ac50fce3d5ef5c2164781059973486a910063bfabf611' 
  AND token = 'jKm5sn0lBJeS5ZwER1oyB1GrroyRdQcd6jseWNv6iVs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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