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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9527dd5e6c8880d615ce6f5a01294373172e57305cd959e8276cd1c66c2e0c48' 
  AND token = 'ZlyfWt9t8ZSyZFdHGPV8w6XuSyNCnvIPXXqEMUmElwI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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