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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '92005b46275f650cfb37816c24254045eeb8f3fe80230748816a0b62ddf3521f' 
  AND token = 'yjXqknqFlgv0BFipzap989+bn/r8r7m6nh664+4/xI0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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