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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5507c8735fead6d0a3a32f8195b92005cb459f6756ab3d76230751108350cc82' 
  AND token = 'idP/Ey8uhdeKh4FGS5+gOT9BNeLM0envVeXBHOLk1gA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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