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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'eba515ec5d4ab4533950ffe81b6ccf71820411038d7259dd8fc43fbb311e380f' 
  AND token = '3i8toAro5OSgEzOIIUT4/T5wV2WrOi7akGZqb33kOOE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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