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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '332069fe06bf542e0ad2efbb767649752aade99aec04eb357848ecb993bb0230' 
  AND token = 'e2TeGVj8QZt2RBJ/sSXzndYQeul9Jqa5d0Jyzh89zrE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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