SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '79fea9f2ba0738204550ee115bb13fe66b608012d020e0454409835e16ead7aa' 
  AND token = 'eQD8Cm+w4ly1oahjVp7h/ztR7LgNNnkpZluTRySTYJA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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