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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e22e4fa06a0f65fb1638cc0ebeadbe98f3992d1ad269f11cbbc84c2734e059f0' 
  AND token = 'fuGdcbbp+ATIwybflaBk8hfe390b6ppozAfRK9gxfXI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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