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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a815d672087401aee0ea648cf54fe5ce08ccede1eaef075ce4d185f11500b34' 
  AND token = 'axogGm6XZ9+e/jXGlujNDqPXILB4haazi2LJLlIL220=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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