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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bb3bc0b0c5d6aba1324369cc3aea0f4c717d989507c020d6eeb660ca383f9084' 
  AND token = 'WqbnyLGXeHRL3vAk1GVieSn/p/FbkSwP/5x3Vg0IcfI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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